New words：
flight [flaɪt] n.飞行；班机
Sample Sentences：
We're booked on the same flight.
We met on a flight from London to Paris.
If we leave now, I can catch the earlier flight.
Birds use warm air currents to help their flight.
New words：
delay [dɪˈleɪ]
v.延迟；推迟；延期；使迟到
n.延误；延期；耽搁；延迟
Sample Sentences：
The arrival of the train was delayed.
Your flight might be delayed… or even cancelled.
The plane's landing was delayed because of heavy fog.
Report it to the police without delay (= immediately) .
flight [flaɪt] n.飞行；班机；飞行
New words：
community [kəˈmjunəti] n.社区；社团；公众；社会团体
Sample Sentences：
I joined a reading community.
Our community has a big park for kids to play.
Many students do community service during summer vacation.
New words：
communication [kəˌmjunɪˈkeɪʃ(ə)n] n.通信；交际；交流；信息
Sample Sentences：
We are in regular communication by letter.
Animals have their own ways of communication.
The new airport will improve communications between the islands.
New words：
communicate [kəˈmjunɪˌkeɪt] v.沟通；传达；交际，交流；传播；传染
Sample Sentences：
They communicated in sign language.
Dolphins use sound to communicate with each other.
The disease is communicated through dirty drinking water.
He was eager to communicate his ideas to his best friend.
communication [kəˌmjunɪˈkeɪʃ(ə)n] n.通信；交际；交流；信息